Avaliação da função ventricular direita em cães portadores da Síndrome do Braquicefálico antes e após rinoplastia

Abstract

The Brachycephalic Syndrome is frequent in individuals of these races and occurs due to anatomical alterations that obstruct the airflow, cause the turbulence of this flow and generate the increase of the negative pressure inside the airways. In addition to also causing secondary anatomical changes, due to hypoxia due to anatomical obstructions, pulmonary vasoconstriction occurs, increasing vascular resistance. This condition can lead to the development of Cor Pulmonale due to right ventricular overload. Doppler echocardiography is important in the diagnosis of cardiac abnormalities, being an easily accessible method for the morphofunctional evaluation and diagnosis of alterations secondary to the increase of pulmonary vascular resistance in the right ventricle. The surgical treatment is curative and aims to correct anatomical changes, reducing its deleterious effect. This study aims to evaluate the beneficial effect of laser scalpel alavestibuloplasty corrective surgery on right ventricular heart function on right ventricular heart function using the Pulmonary Flow Rate (VmFP), Pulmonary Flow Gradient (GrFP), E, A, A’, E’, Tricuspide anular plane systolic excursion (TAPSE), Wave S, Right Ventricular Diastolic Area (AdVD), Right Ventricular Systolic Area (VSD), Fractional area change (FAC) and pulmonary artery flow pattern; after the surgical treatment of 16 brachycephalic dogs, aged between seven months and five years, comparing the results of the Doppler echocardiogram before and after the surgical procedure. In 60 days after the study, we can see the increase in the right ventricular diastolic and systolic area and a tendency to decrease hyperkinesia by TAPSE, corresponding to the improvement of the right ventricle function.